Cylindrical Shaped Snorkel Interface on Evaluation Probe
AssigneeWeatherford/Lamb, Inc.
InventorDennis Eugene Roessler
Life of this patent
Estimating the term…
Abstract
A snorkel and pad for use with a formation testing tool is formed with a cylindrical geometry at the interface where the snorkel and pad contacts the inner surface of a borehole. The cylindrical geometry reduces or eliminates gaps that a flat interface surface would leave between the snorkel and the inner surface of the borehole, reducing the possibility that a surrounding pad could extrude through the gap. The snorkel is prevented from rotating during operation, ensuring the correct orientation of the cylindrical geometry interface surface relative to the inner surface of the borehole. The snorkel may be used as part of a formation testing system.
Claims22
A method for reducing extrusion of a protective pad into a snorkel of a formation testing tool, comprising:
- forming a cylindrical geometry at a borehole interface of a first snorkel,
- wherein the cylindrical geometry is operationally axially aligned parallel to a longitudinal axis of the borehole.
A snorkel for use in a formation testing tool, comprising:
- a tubular body, configured for extension from and retraction into a piston cylinder of the formation testing tool;
- and
- a borehole interface, disposed at a radially outward and of the tubular body, having a cylindrical geometry,
- wherein the cylindrical geometry of the borehole interface is operationally axially aligned parallel to a longitudinal axis of the borehole.
A system for testing an earth formation surrounding a borehole, comprising:
- a formation testing tool, comprising:
- a plurality of sections, at least one of which comprises:
- a piston cylinder;
- and
- a first snorkel configured for extension from and retraction into the piston cylinder, comprising:
- a tubular body, configured for extension from and retraction into the piston cylinder;
- and
- a borehole interface, disposed at a radially outward end of the tubular body, having a cylindrical geometry,
- wherein the cylindrical geometry of the borehole interface is operationally axially aligned parallel to a longitudinal axis of the borehole;
- a conveyance apparatus;
- and
- a connecting structure operationally connecting the formation testing tool to the conveyance apparatus to convey the formation testing tool in the borehole.
A formation testing tool, comprising:
- a plurality of sections, at least one of which comprises:
- a piston cylinder;
- and
- a first snorkel configured for extension from and retraction into the piston cylinder, comprising:
- a tubular body, configured for extension from and refraction into the piston cylinder;
- and
- a borehole interface, disposed at a radially outward end of the tubular body, having a cylindrical geometry,
- wherein the cylindrical geometry of the borehole interface is operationally axially aligned parallel to a longitudinal axis of the borehole.
Dependencies are inferred from the claim text.